Assighob to wygkoef



T. H. LLOYD.

CHASER ADJUSTING TOOL.

Arum/mou meu :un: T. 192|.

` OFFQE.

THOMAS H. IL'LUSCD7 `OF SPRINGFIELD, .ILIASSACHUSETTS, ASSIGNOR TO'WYKOFF eink LLOYD COMPANY, or SPRINGFIELD, MAssAcHUsETTsA coaroaATIoN orMASSA- CHUSETTS.

Malaise.

Application led June 7, 1921.

T 0 all 'whom 'it may concern.'

Be it known that I, T HoMAs H. LLOYD, a citizen of the United States ofAmerica, re siding at Springfield, in the county of Hampden andCommonwealth of Massa- Chusetts, have invented certain new and usefulImprovements in Chaser-Adjusting Tools, of which the following is aspecification.

This invention relates to improvements in Chaser adjusting implementsfor use in adjusting or-setting the chasers, or lands, in thread cuttingdies which are. `used by plumbers and steam fitters for Cutting thethreads on the ends ofpipes.

In practice, it has been found ai slow and difficult matter toaccurately adjust all of the chasers in a thread Cutting die; so that inoperation the teeth of each Chaser will perform its proper share of thework; or in other words, the teeth'of one Chaser will not Cut a threadthat is deeper than those cut by the other Chasers. In order to haveeach Chaser perform its individual share of the work, they must all beaccurately set, or adjusted, with relation to the forward surface of theChaser holder.

An object, therefore, of the present inven tion, is to provide a tool,or implement,

which may be employed to quickly and accurately adjust the Chasers of athread Cuttin die so that they will equally perform their individualshare of the work.

Broadl considered, the implement comprises a ase-piece or member that isdesigned to rest against the Chaser holder, and a member pivotallyattached to the basepieCe with which the ends 0f the Cutting threads ofthe Chasers engage, whereby, when the Chasers are correctly adjusted,the pointer which is carried by the pivoted member, will register or bein line with its zero position. The zero position is indicated on thebase-piece. The implement will be fully described in the body of thevspecification, and its novelty will be particularly pointedout in theclaims.

Referring to the drawings:

Fig. 1 is a plan view of a portion of the die in which the Chasers areplaced, and shows a Chaser holder, one of the Chasers, the thread foradjustin the same, and also the implement in use or determining theposition of the Chaser.

Specification of Letters Patent.

Serial No. 475,626.

Fig. is a detail side view of the implement with the pointer in its Zeroposition.

Fig. 2A is an end View of Fig. 2. Fig. 3 is a modification in which aCoil of insulated wire is wound about a' portion of the base piece ofthe implement for magneti- Call retaining it in place on the Chaser holer. Fig. 4 is a view showing the implement in use and magnetized toprevent its detachment.

Fig. 5 is aview illustrating the relation of the Chasers to the pipe onwhich a thread is to be Cut.

Referring to the drawings in detail: 1V

designates one of the Chaser holders, 2 one of the Chasers thereon, 3 athreaded member having a squared end 4 for receiving a suitable tool forturning vthe threaded member for moving and adjusting the Chaser on itsholder. l The implement herein shown is employed in order to accuratelyposition the Chaser 2 with reference to the surfaces 5 yand 6 of theholder so that the forward ends 7 of the teeth of the Chaser will lie inthe saine plane as the surfaces 5 and 6 and also in or tangent to thecircle 8 which indicates a section of the pipe on which a thread is tobe Cut. The implement comprises the basepiece 9 having the member 10pivotally se- Cured thereto by means lof the pin 11. The piece 9 andmember 10 have Curved surfaces which fit together asindicated at 12. 13indicates a lip which extends outward from the base-piece 9 and is forengaging the side of the Chaser holder, as shown, to prevent theimplement from moving out of place when in use. Attached to thepivotally Connected piece 10 is a pointer 14. This pointer will registerwith the line 15 when the piece 9 and member 10 are in the same plane,as shown in Figs. 2 and 3. The implement is used as follows:

The base piece 9 is placed on or against the surfaces 5 andy 6 of theChaser holder '1, the piece 10 is placed against the lends 7 of theteeth ofthe Chaser 2, the operator then rotates the screw 3 by applyinga suitable tool to the part 4. This operation Causes the Chaser to moveforward and turn the pivotal part 10 and pointer 14. When the pointerregisters with the line 15 the forward ends of the teeth of the Chaser 2will -Patented "May 9, 1922. j

be in the same plane as the surfaces 5 and 6. They will also be an equalradial distance from the center of the pipe, indicated in Fig. 5 at-8.

For the purpose of retaining the implement in place on the chaser holder1, several turns of insulated magnet Wire are Wound around a recessedpart 9 of the basepiece 9, kas indicated at 16. A` suitable source ofelectrical energy 17 and electric circuit 18 is connected to the coil 16With a circuit closer key 19 therein. When the circuit -isv closed thebase-,piece 9 becomes magnetized and Will remain on the surfaces 5 and 6of the holder 1 as long as the circuit remains closed, thus preventingthe implement from becoming detached during the adjusting operation ofthe chasers. As shovvn in Fig. 4, the implement Would fall by gravityunless it Was held in place by some suitable means. 1 have thereforemade use of the electric current for magnetizing the implement, as beingconvenient and suitable for this purpose, as is readily understood.

20 designates the end portion of the lip or flange 13 Which engages theinclined surface 1 of the holder 1 adjacent the surface 5 for thepurpose of accurately locating the implement on the surfaces 5 and 6 andlongitudinally of the implement. The lip 13 and its end part 20 Fig. 1therefore permits both longitudinal and lateral adjustment of theimplement.

What v1 claim is: j

1. An implement for the purpose described, comprising' a base-piece, apart movably connected thereto, a pointer or indicating member carriedby the movable part, the base piece having a lip for positioning thebase piece on a fixed reference surface, said base-piece being vdesignedfor engagement With the vliXed reference surface and the movable part vvith a part that is to be adjusted into the same plane as the referencesurface.

2. lin an implement for adjusting the chasers of a thread cutting die, abase-piece for engaging the chaser holder, a part pivotally connected tothe base piece and vcarrying a pointer Which is designed to register`With an indicating line on the base-piece When the forward cuttingteeth of a chaser are in the same plane as the surface on which thebase-piece rests, as described.

3. An implement for the purpose described, comprising a base-pieceprovided with a reference line, a part movably connected to thebase-piece, a pointer on the movable part and designed to register Withthe reference line when the base-piece and movable part are in the sameplane, as described.

4. A chaser adjusting implement comprising a base-piece having a flangepart for positioning the same on the chaser both longitudinally andtransversely thereof, and a part movably connected to' the base pieceand means for determining lWhen the basepiece and movable part are inalignment, as described.

5. A chaser adjusting implement comprising a base-piece having a flangepart for positioning the same on the chaser bothlongitudinally andtransversely thereof, a

part movably connected to the base piece,

means for determining When the faces of base-piece and the movable partare in the same plane, as described, and means for temporarily retainingthe implement in place on the holder. Y

6.'A chaser adjusting implement comprising a base-piece or the like,having a coil Y of magnet Wire thereon, a part movably connected to saidpiece, a pointer device on the movable piece and movable With relationto the base piece for determining its position with reference to saidpiece, and said implement being magnetically held in place when thecircuit is closed through the coil, as described.

7. A chaser adjusting; implement comas described, and means on thebase-piece for determining the position of the implement when in use,both as to its lateral and longitudinal position. j

8. A device for ydetermining the correct radial adjustment'of a chaserof a thread cutting die, comprising in combination, of a base orreference piece for engaging a face of the die-holder and beyond Whichthe cutting point of the chaser' extends, a member movably connected tothe base-piecev With which the cutting point of the chaser engages, apointer iXedly secured to the movable member and arranged to svving overthe base-piece with reference to acero point` thereon for indicatingwhen the cutting point of the chaser is in the same plane as the face ofthe die holder and With Which face the base-piece of the device engages,as described.

THOMAS H. VLLoaie.

